# Units of Measure

Detailed list of measurement units accepted for each product category in EC3, see [here](https://docs.google.com/spreadsheets/d/19WYnuZrlVfuyd4SBZOgKv-iySRKR2IKq/edit#gid=120161577). The following is a summary of the main units in their respective dimensions.

{% hint style="warning" %}
When it comes to units of **tons**, EC3 differentiates SI and USA units in the following way:

* SI, i.e., metric ton:    t, tonne, metric ton
* USA, i.e., short ton:    ton, short ton
  {% endhint %}

<table><thead><tr><th width="279">Dimensionality</th><th>Unit of Measure that EC3 will accept and understand</th></tr></thead><tbody><tr><td>Unit</td><td>item, ea, pc, unit, piece, doz</td></tr><tr><td>Mass</td><td>g, kg, t, tonne,<br>lb, lbs, ton, short_ton, oz</td></tr><tr><td>Length</td><td>in, ft, yd, yds, inch, mil, mi,<br>inch, foot, feet, mile, miles,<br>km, m, cm, mm...</td></tr><tr><td>Area</td><td>sy, sqyd, yd2<br>sf, sqft, ft2,<br>sqin, in2<br>km2, m2, cm2, mm2...</td></tr><tr><td>Volume</td><td>cf, cuft, ft3,<br>cy, cuyd, yd3,<br>cuin, in3,<br>bf, mbf, mmbf,<br>L, gal<br>km3, m3, cm3, mm3...</td></tr><tr><td>Pressure</td><td>MPa, GPa, Pa, TPa...<br>psi, ksi</td></tr><tr><td>Power</td><td>kW, MW, W, kilowatt, watt, megawatt</td></tr><tr><td>Energy</td><td>J, MJ and all metric prefixes,<br>kWh, Wh, and all metric prefixes.<br>Btu, kBtu, MBtu<br>scf</td></tr><tr><td>mass * distance</td><td>tkm, tmi</td></tr><tr><td>area * thermal resistivity</td><td>ft2 RSI, m2 RSI, r_value</td></tr></tbody></table>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.buildingtransparency.org/ec3/main-features/plan-and-compare-buildings/units-of-measure.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.